Containers for Bonsai

Most plant material for bonsai has long roots that will not fit into a
bonsai container. For this reason a training pot is used. The training
pot is larger than a bonsai container and holds the heavy roots, which
are gradually cut back, for a period of years until small, fibrous roots
develop.

All kinds of containers are used for training pots: clay saucers,
plastic containers, and wooden boxes of many different sizes. Many of
these clay and plastic pots are available at garden centers. The azalea
pot and the bulb pan are especially suitable. The pot should be just
large enough to accommodate the tree's root system. It should be similar
in shape to the bonsai pot which will eventually replace it.

For example, an upright tree, destined for a low, flat container, should
be grown in a fairly low training pot. A cascading tree, to be planted
later in a high bonsai pot, should be trained in an ordinary flower pot.

Make sure that all training pots you use have drain holes at least 1/2-
inch in diameter.

Choose a pot in which to display your bonsai when the training of your
bonsai is sufficiently advanced. The size and shape of this pot will
depend on the size and shape of the tree.

Trees trained in the cascade and semicascade styles look best in round
or rectangular pots. Plant the trunk in the center of the pot with the
branches sweeping down over the side.

Place upright trees slightly off-center (one-third the distance from one
end) in oval or rectangular pots. Place trees with thick trunks and
dense foliage in deep, heavy pots.

Branches of a bonsai should harmonize with the shape of a pot. If the
branches are longer on one side than the other, place the trunk off-
center in the pot.

The color of the pot should contrast with the tree's foliage. Use white,
tan, or green pots for trees with brightly colored flowers or fruits.
Use unglazed pots with pines and deciduous trees.

Generally, bonsai containers come in five shapes: round, oval, square,
rectangular, and hexagonal. In each shape there is a wide variety of
sizes.

Bonsai containers can be obtained from some of the larger nurseries.
Chinese or Japanese hardware stores, and stores that specialize in
imported items, also offer containers.

Bonsai plants must be anchored to their containers until the roots take
hold. One method used to anchor the plant is to tie it down with wires
leading up through the screens that are placed over the drainage holes
in the container. After tying the plant to the container, adjust the
plant's elevation.